کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
194817 459800 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Methanol oxidation on gold nanoparticles in alkaline media: Unusual electrocatalytic activity
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Methanol oxidation on gold nanoparticles in alkaline media: Unusual electrocatalytic activity
چکیده انگلیسی

Methanol oxidation on gold nanoparticles has been studied using cyclic voltammetry in alkaline media. The onset for methanol oxidation in 0.1 M NaOH solutions is at ca. 0.3 V (RHE) and the currents reach a maximum value at 0.8 V. In 1 M NaOH solutions, oxidation currents are measured at potentials as low as 0.1 V. Although the currents are significantly smaller than the expected limiting diffusion current for methanol oxidation, oxidation currents are partially controlled by diffusion, as revealed by rotating disk experiments. This suggests that only a small fraction of the nanoparticles is active for the oxidation. It is proposed that formate is the final product of the oxidation and formaldehyde is an active intermediate in the process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 52, Issue 4, 1 December 2006, Pages 1662–1669
نویسندگان
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